Arm sleeve



FIG. 1 is a perspective view of an arm sleeve on a user, showing my new design; and,

FIG. 2 is a top plan view of the arm sleeve of FIG. 1 .

The broken lines in FIGS. 1-2 show portions of the arm sleeve and arm environment in FIG. 1 that form no part of the claimed design. Any portions of the arm sleeve that are not shown form no part of the claimed design. 

CLAIM The ornamental design for an arm sleeve, as shown and described. 